INCI · other · CIR review pending · used in 2 products
Water (Aqua/Eau)
Water (Aqua/Eau), H2O, is the most common cosmetic ingredient and is typically listed first on ingredient lists, indicating it is the largest component by volume. It primarily functions as a solvent for water-soluble ingredients. The water used in cosmetics is purified and deionized, meaning nearly all mineral ions are removed to improve product stability over time.
Evidence level
strongEWG score
—Comedogenic
—Category
other● Benefits
Water acts as a solvent to dissolve and carry other ingredients within a formulation. Once absorbed into the skin, it contributes to hydration; however, applying pure water topically (e.g., prolonged bathing) can actually be drying to the skin.
hydrating
● Cautions
Applying pure water directly and repeatedly to the skin (e.g., long baths) can be drying rather than hydrating.
